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1 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2 : /*
3 : * This file is part of the LibreOffice project.
4 : *
5 : * This Source Code Form is subject to the terms of the Mozilla Public
6 : * License, v. 2.0. If a copy of the MPL was not distributed with this
7 : * file, You can obtain one at http://mozilla.org/MPL/2.0/.
8 : *
9 : * This file incorporates work covered by the following license notice:
10 : *
11 : * Licensed to the Apache Software Foundation (ASF) under one or more
12 : * contributor license agreements. See the NOTICE file distributed
13 : * with this work for additional information regarding copyright
14 : * ownership. The ASF licenses this file to you under the Apache
15 : * License, Version 2.0 (the "License"); you may not use this file
16 : * except in compliance with the License. You may obtain a copy of
17 : * the License at http://www.apache.org/licenses/LICENSE-2.0 .
18 : */
19 :
20 : #include "recovery/dbdocrecovery.hxx"
21 : #include "sdbcoretools.hxx"
22 : #include "storagetextstream.hxx"
23 : #include "subcomponentrecovery.hxx"
24 : #include "subcomponents.hxx"
25 : #include "dbastrings.hrc"
26 :
27 : #include <com/sun/star/sdb/application/XDatabaseDocumentUI.hpp>
28 : #include <com/sun/star/embed/ElementModes.hpp>
29 : #include <com/sun/star/document/XStorageBasedDocument.hpp>
30 : #include <com/sun/star/io/XTextOutputStream.hpp>
31 : #include <com/sun/star/io/TextInputStream.hpp>
32 : #include <com/sun/star/io/XActiveDataSource.hpp>
33 : #include <com/sun/star/io/XActiveDataSink.hpp>
34 : #include <com/sun/star/util/XModifiable.hpp>
35 : #include <com/sun/star/beans/XPropertySet.hpp>
36 :
37 : #include <comphelper/namedvaluecollection.hxx>
38 : #include <rtl/ustrbuf.hxx>
39 : #include <tools/diagnose_ex.h>
40 :
41 : #include <algorithm>
42 :
43 : namespace dbaccess
44 : {
45 :
46 : using css::uno::Reference;
47 : using css::uno::XInterface;
48 : using css::uno::UNO_QUERY;
49 : using css::uno::UNO_QUERY_THROW;
50 : using css::uno::UNO_SET_THROW;
51 : using css::uno::Exception;
52 : using css::uno::RuntimeException;
53 : using css::uno::Any;
54 : using css::uno::makeAny;
55 : using css::uno::Sequence;
56 : using css::uno::Type;
57 : using css::uno::XComponentContext;
58 : using css::embed::XStorage;
59 : using css::frame::XController;
60 : using css::sdb::application::XDatabaseDocumentUI;
61 : using css::lang::XComponent;
62 : using css::document::XStorageBasedDocument;
63 : using css::beans::PropertyValue;
64 : using css::io::XStream;
65 : using css::io::XTextOutputStream;
66 : using css::io::XActiveDataSource;
67 : using css::io::TextInputStream;
68 : using css::io::XTextInputStream2;
69 : using css::io::XActiveDataSink;
70 : using css::frame::XModel;
71 : using css::util::XModifiable;
72 : using css::beans::XPropertySet;
73 :
74 : namespace ElementModes = css::embed::ElementModes;
75 :
76 : // helpers
77 : namespace
78 : {
79 0 : static void lcl_getPersistentRepresentation( const MapStringToCompDesc::value_type& i_rComponentDesc, OUStringBuffer& o_rBuffer )
80 : {
81 0 : o_rBuffer.append( i_rComponentDesc.first );
82 0 : o_rBuffer.append( '=' );
83 0 : o_rBuffer.append( i_rComponentDesc.second.sName );
84 0 : o_rBuffer.append( ',' );
85 0 : o_rBuffer.append( sal_Unicode( i_rComponentDesc.second.bForEditing ? '1' : '0' ) );
86 0 : }
87 :
88 0 : static bool lcl_extractCompDesc( const OUString& i_rIniLine, OUString& o_rStorName, SubComponentDescriptor& o_rCompDesc )
89 : {
90 0 : const sal_Int32 nEqualSignPos = i_rIniLine.indexOf( '=' );
91 0 : if ( nEqualSignPos < 1 )
92 : {
93 : OSL_FAIL( "lcl_extractCompDesc: invalid map file entry - unexpected pos of '='" );
94 0 : return false;
95 : }
96 0 : o_rStorName = i_rIniLine.copy( 0, nEqualSignPos );
97 :
98 0 : const sal_Int32 nCommaPos = i_rIniLine.lastIndexOf( ',' );
99 0 : if ( nCommaPos != i_rIniLine.getLength() - 2 )
100 : {
101 : OSL_FAIL( "lcl_extractCompDesc: invalid map file entry - unexpected pos of ','" );
102 0 : return false;
103 : }
104 0 : o_rCompDesc.sName = i_rIniLine.copy( nEqualSignPos + 1, nCommaPos - nEqualSignPos - 1 );
105 0 : o_rCompDesc.bForEditing = ( i_rIniLine[ nCommaPos + 1 ] == '1' );
106 0 : return true;
107 : }
108 :
109 0 : static const OUString& lcl_getRecoveryDataSubStorageName()
110 : {
111 0 : static const OUString s_sRecDataStorName( "recovery" );
112 0 : return s_sRecDataStorName;
113 : }
114 :
115 0 : static const OUString& lcl_getObjectMapStreamName()
116 : {
117 0 : static const OUString s_sObjectMapStreamName( "storage-component-map.ini" );
118 0 : return s_sObjectMapStreamName;
119 : }
120 :
121 0 : static const OUString& lcl_getMapStreamEncodingName()
122 : {
123 0 : static const OUString s_sMapStreamEncodingName( "UTF-8" );
124 0 : return s_sMapStreamEncodingName;
125 : }
126 :
127 0 : static void lcl_writeObjectMap_throw( const Reference<XComponentContext> & i_rContext, const Reference< XStorage >& i_rStorage,
128 : const MapStringToCompDesc& i_mapStorageToCompDesc )
129 : {
130 0 : if ( i_mapStorageToCompDesc.empty() )
131 : // nothing to do
132 0 : return;
133 :
134 0 : StorageTextOutputStream aTextOutput( i_rContext, i_rStorage, lcl_getObjectMapStreamName() );
135 :
136 0 : aTextOutput.writeLine( "[storages]" );
137 :
138 0 : for ( MapStringToCompDesc::const_iterator stor = i_mapStorageToCompDesc.begin();
139 0 : stor != i_mapStorageToCompDesc.end();
140 : ++stor
141 : )
142 : {
143 0 : OUStringBuffer aLine;
144 0 : lcl_getPersistentRepresentation( *stor, aLine );
145 :
146 0 : aTextOutput.writeLine( aLine.makeStringAndClear() );
147 0 : }
148 :
149 0 : aTextOutput.writeLine();
150 : }
151 :
152 0 : static bool lcl_isSectionStart( const OUString& i_rIniLine, OUString& o_rSectionName )
153 : {
154 0 : const sal_Int32 nLen = i_rIniLine.getLength();
155 0 : if ( i_rIniLine.startsWith("[") && i_rIniLine.endsWith("]") )
156 : {
157 0 : o_rSectionName = i_rIniLine.copy( 1, nLen -2 );
158 0 : return true;
159 : }
160 0 : return false;
161 : }
162 :
163 0 : static void lcl_stripTrailingLineFeed( OUString& io_rLine )
164 : {
165 0 : const sal_Int32 nLen = io_rLine.getLength();
166 0 : if ( io_rLine.endsWith("\n") )
167 0 : io_rLine = io_rLine.copy( 0, nLen - 1 );
168 0 : }
169 :
170 0 : static void lcl_readObjectMap_throw( const Reference<XComponentContext> & i_rxContext, const Reference< XStorage >& i_rStorage,
171 : MapStringToCompDesc& o_mapStorageToObjectName )
172 : {
173 0 : ENSURE_OR_THROW( i_rStorage.is(), "invalid storage" );
174 0 : if ( !i_rStorage->hasByName( lcl_getObjectMapStreamName() ) )
175 : { // nothing to do, though suspicious
176 : OSL_FAIL( "lcl_readObjectMap_throw: if there's no map file, then there's expected to be no storage, too!" );
177 0 : return;
178 : }
179 :
180 0 : Reference< XStream > xIniStream( i_rStorage->openStreamElement(
181 0 : lcl_getObjectMapStreamName(), ElementModes::READ ), UNO_SET_THROW );
182 :
183 0 : Reference< XTextInputStream2 > xTextInput = TextInputStream::create( i_rxContext );
184 0 : xTextInput->setEncoding( lcl_getMapStreamEncodingName() );
185 0 : xTextInput->setInputStream( xIniStream->getInputStream() );
186 :
187 0 : OUString sCurrentSection;
188 0 : bool bCurrentSectionIsKnownToBeUnsupported = true;
189 0 : while ( !xTextInput->isEOF() )
190 : {
191 0 : OUString sLine = xTextInput->readLine();
192 0 : lcl_stripTrailingLineFeed( sLine );
193 :
194 0 : if ( sLine.isEmpty() )
195 0 : continue;
196 :
197 0 : if ( lcl_isSectionStart( sLine, sCurrentSection ) )
198 : {
199 0 : bCurrentSectionIsKnownToBeUnsupported = false;
200 0 : continue;
201 : }
202 :
203 0 : if ( bCurrentSectionIsKnownToBeUnsupported )
204 0 : continue;
205 :
206 : // the only section we support so far is "storages"
207 0 : if ( sCurrentSection != "storages" )
208 : {
209 0 : bCurrentSectionIsKnownToBeUnsupported = true;
210 0 : continue;
211 : }
212 :
213 0 : OUString sStorageName;
214 0 : SubComponentDescriptor aCompDesc;
215 0 : if ( !lcl_extractCompDesc( sLine, sStorageName, aCompDesc ) )
216 0 : continue;
217 0 : o_mapStorageToObjectName[ sStorageName ] = aCompDesc;
218 0 : }
219 : }
220 :
221 0 : static void lcl_markModified( const Reference< XComponent >& i_rSubComponent )
222 : {
223 0 : const Reference< XModifiable > xModify( i_rSubComponent, UNO_QUERY );
224 0 : if ( !xModify.is() )
225 : {
226 : OSL_FAIL( "lcl_markModified: unhandled case!" );
227 0 : return;
228 : }
229 :
230 0 : xModify->setModified( sal_True );
231 : }
232 : }
233 :
234 : // DatabaseDocumentRecovery_Data
235 0 : struct DBACCESS_DLLPRIVATE DatabaseDocumentRecovery_Data
236 : {
237 : const Reference<XComponentContext> aContext;
238 :
239 0 : DatabaseDocumentRecovery_Data( const Reference<XComponentContext> & i_rContext )
240 0 : :aContext( i_rContext )
241 : {
242 0 : }
243 : };
244 :
245 : // DatabaseDocumentRecovery
246 0 : DatabaseDocumentRecovery::DatabaseDocumentRecovery( const Reference<XComponentContext> & i_rContext )
247 0 : :m_pData( new DatabaseDocumentRecovery_Data( i_rContext ) )
248 : {
249 0 : }
250 :
251 0 : DatabaseDocumentRecovery::~DatabaseDocumentRecovery()
252 : {
253 0 : }
254 :
255 0 : void DatabaseDocumentRecovery::saveModifiedSubComponents( const Reference< XStorage >& i_rTargetStorage,
256 : const ::std::vector< Reference< XController > >& i_rControllers )
257 : {
258 0 : ENSURE_OR_THROW( i_rTargetStorage.is(), "invalid document storage" );
259 :
260 : // create a sub storage for recovery data
261 0 : if ( i_rTargetStorage->hasByName( lcl_getRecoveryDataSubStorageName() ) )
262 0 : i_rTargetStorage->removeElement( lcl_getRecoveryDataSubStorageName() );
263 0 : Reference< XStorage > xRecoveryStorage = i_rTargetStorage->openStorageElement( lcl_getRecoveryDataSubStorageName(), ElementModes::READWRITE );
264 :
265 : // store recovery data for open sub components of the given controller(s)
266 0 : if ( !i_rControllers.empty() )
267 : {
268 0 : ENSURE_OR_THROW( i_rControllers.size() == 1, "can't handle more than one controller" );
269 : // At the moment, there can be only one view to a database document. If we ever allow for more than this,
270 : // then we need a concept for sub documents opened from different controllers (i.e. two document views,
271 : // and the user opens the very same form in both views). And depending on this, we need a concept for
272 : // how those are saved to the recovery file.
273 :
274 0 : MapCompTypeToCompDescs aMapCompDescs;
275 :
276 0 : for ( ::std::vector< Reference< XController > >::const_iterator ctrl = i_rControllers.begin();
277 0 : ctrl != i_rControllers.end();
278 : ++ctrl
279 : )
280 : {
281 0 : Reference< XDatabaseDocumentUI > xDatabaseUI( *ctrl, UNO_QUERY_THROW );
282 0 : Sequence< Reference< XComponent > > aComponents( xDatabaseUI->getSubComponents() );
283 :
284 0 : const Reference< XComponent >* component = aComponents.getConstArray();
285 0 : const Reference< XComponent >* componentEnd = aComponents.getConstArray() + aComponents.getLength();
286 0 : for ( ; component != componentEnd; ++component )
287 : {
288 0 : SubComponentRecovery aComponentRecovery( m_pData->aContext, xDatabaseUI, *component );
289 0 : aComponentRecovery.saveToRecoveryStorage( xRecoveryStorage, aMapCompDescs );
290 0 : }
291 0 : }
292 :
293 0 : for ( MapCompTypeToCompDescs::const_iterator map = aMapCompDescs.begin();
294 0 : map != aMapCompDescs.end();
295 : ++map
296 : )
297 : {
298 0 : Reference< XStorage > xComponentsStor( xRecoveryStorage->openStorageElement(
299 0 : SubComponentRecovery::getComponentsStorageName( map->first ), ElementModes::WRITE | ElementModes::NOCREATE ) );
300 0 : lcl_writeObjectMap_throw( m_pData->aContext, xComponentsStor, map->second );
301 0 : tools::stor::commitStorageIfWriteable( xComponentsStor );
302 0 : }
303 : }
304 :
305 : // commit the recovery storage
306 0 : tools::stor::commitStorageIfWriteable( xRecoveryStorage );
307 0 : }
308 :
309 0 : void DatabaseDocumentRecovery::recoverSubDocuments( const Reference< XStorage >& i_rDocumentStorage,
310 : const Reference< XController >& i_rTargetController )
311 : {
312 0 : ENSURE_OR_THROW( i_rDocumentStorage.is(), "illegal document storage" );
313 0 : Reference< XDatabaseDocumentUI > xDocumentUI( i_rTargetController, UNO_QUERY_THROW );
314 :
315 0 : if ( !i_rDocumentStorage->hasByName( lcl_getRecoveryDataSubStorageName() ) )
316 : // that's allowed
317 0 : return;
318 :
319 : // the "recovery" sub storage
320 0 : Reference< XStorage > xRecoveryStorage = i_rDocumentStorage->openStorageElement( lcl_getRecoveryDataSubStorageName(), ElementModes::READ );
321 :
322 : // read the map from sub storages to object names
323 0 : MapCompTypeToCompDescs aMapCompDescs;
324 0 : SubComponentType aKnownTypes[] = { TABLE, QUERY, FORM, REPORT, RELATION_DESIGN };
325 0 : for ( size_t i = 0; i < sizeof( aKnownTypes ) / sizeof( aKnownTypes[0] ); ++i )
326 : {
327 0 : if ( !xRecoveryStorage->hasByName( SubComponentRecovery::getComponentsStorageName( aKnownTypes[i] ) ) )
328 0 : continue;
329 :
330 0 : Reference< XStorage > xComponentsStor( xRecoveryStorage->openStorageElement(
331 0 : SubComponentRecovery::getComponentsStorageName( aKnownTypes[i] ), ElementModes::READ ) );
332 0 : lcl_readObjectMap_throw( m_pData->aContext, xComponentsStor, aMapCompDescs[ aKnownTypes[i] ] );
333 0 : xComponentsStor->dispose();
334 0 : }
335 :
336 : // recover all sub components as indicated by the map
337 0 : for ( MapCompTypeToCompDescs::const_iterator map = aMapCompDescs.begin();
338 0 : map != aMapCompDescs.end();
339 : ++map
340 : )
341 : {
342 0 : const SubComponentType eComponentType = map->first;
343 :
344 : // the storage for all components of the current type
345 0 : Reference< XStorage > xComponentsStor( xRecoveryStorage->openStorageElement(
346 0 : SubComponentRecovery::getComponentsStorageName( eComponentType ), ElementModes::READ ), UNO_QUERY_THROW );
347 :
348 : // loop thru all components of this type
349 0 : for ( MapStringToCompDesc::const_iterator stor = map->second.begin();
350 0 : stor != map->second.end();
351 : ++stor
352 : )
353 : {
354 0 : const OUString sComponentName( stor->second.sName );
355 0 : if ( !xComponentsStor->hasByName( stor->first ) )
356 : {
357 : SAL_WARN( "dbaccess",
358 : "DatabaseDocumentRecovery::recoverSubDocuments: inconsistent recovery storage: storage '" <<
359 : stor->first <<
360 : "' not found in '" <<
361 : SubComponentRecovery::getComponentsStorageName( eComponentType ) <<
362 : "', but required per map file!" );
363 0 : continue;
364 : }
365 :
366 : // the controller needs to have a connection to be able to open sub components
367 0 : if ( !xDocumentUI->isConnected() )
368 0 : xDocumentUI->connect();
369 :
370 : // recover the single component
371 0 : Reference< XStorage > xCompStor( xComponentsStor->openStorageElement( stor->first, ElementModes::READ ) );
372 0 : SubComponentRecovery aComponentRecovery( m_pData->aContext, xDocumentUI, eComponentType );
373 0 : Reference< XComponent > xSubComponent( aComponentRecovery.recoverFromStorage( xCompStor, sComponentName, stor->second.bForEditing ) );
374 :
375 : // at the moment, we only store, during session save, sub components which are modified. So, set this
376 : // recovered sub component to "modified", too.
377 0 : lcl_markModified( xSubComponent );
378 0 : }
379 :
380 0 : xComponentsStor->dispose();
381 0 : }
382 :
383 0 : xRecoveryStorage->dispose();
384 :
385 : // now that we successfully recovered, removed the "recovery" sub storage
386 : try
387 : {
388 0 : i_rDocumentStorage->removeElement( lcl_getRecoveryDataSubStorageName() );
389 : }
390 0 : catch( const Exception& )
391 : {
392 : DBG_UNHANDLED_EXCEPTION();
393 0 : }
394 : }
395 :
396 : } // namespace dbaccess
397 :
398 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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